I have been making a few tracks along a new rail line and have been expecting the assistance of a few Strava tracks too, but so far no Strava data is showing.
Does anyone know how often the Strava data is updated on their heatmap or available to use in JOSM? It appears to me to be from about 2015 and none later.
I have found the Strava data very useful for track and satellite alignment and yes you do need to bear in mind it may be at the side of the road or on a cycleway, along with most gpx tracks.